package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.OrdersPageQueryDTO;
import com.sky.dto.OrdersSubmitDTO;
import com.sky.entity.AddressBook;
import com.sky.entity.OrderDetail;
import com.sky.entity.Orders;
import com.sky.entity.ShoppingCart;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.AddressBookMapper;
import com.sky.mapper.OrderDetailMapper;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;

@Service
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private AddressBookMapper addressBookMapper;
    @Autowired
    private WebSocketServer webSocketServer;



    /**
     * 用户下单
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    public OrderSubmitVO submitorder(OrdersSubmitDTO ordersSubmitDTO) {
        //判断收货地址是否为空
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        if (addressBook==null){
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        Long userid = BaseContext.getCurrentId();
        ShoppingCart shoppingCart=new ShoppingCart();
        shoppingCart.setUserId(userid);
        //查询当前用户
        List<ShoppingCart> shoppingCarts=shoppingCartMapper.list(shoppingCart);
        if (shoppingCarts==null &&shoppingCarts.size()==0){
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        //创建订单数据
        Orders order=new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO,order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userid);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());

        orderMapper.insert(order);
        //订单明细数据
        List<OrderDetail> orderDetails=new ArrayList<>();
        for (ShoppingCart cart : shoppingCarts) {
            //创建订单明细
            OrderDetail orderDetail=new OrderDetail();
            BeanUtils.copyProperties(cart,orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetails.add(orderDetail);
        }
        //向订单明细表插入数据
        orderDetailMapper.insertBeach(orderDetails);
        //清理购物车数据
        shoppingCartMapper.deletebyid(userid);
        //返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();

        return orderSubmitVO;
    }

    /**
     * 查询历史订单
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pagedd(int pageNum, int pageSize, Integer status) {
        //设置分页
        PageHelper.startPage(pageNum,pageSize);

        OrdersPageQueryDTO ordersPageQueryDTO=new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        //分页条件查询
        Page<Orders> page = orderMapper.page(ordersPageQueryDTO);
        List<Orders> list=new ArrayList<>();
        if (page !=null && page.getTotal()>0){
            for (Orders orders : page) {
                //获取订单id
                Long id = orders.getId();
                // 查询订单明细
                List<OrderDetail> byOrderId = orderDetailMapper.getByOrderId(id);
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(byOrderId);

                list.add(orderVO);

            }
        }
        return new PageResult(page.getTotal(), list);
    }

    /**
     * 根据id查询订单详情
     * @param id
     * @return
     */
    @Override
    public OrderVO selectbyid(Long id) {
        //查询订单
        Orders orders = orderMapper.getbyid(id);
        //查询该订单对应的菜品/套餐明细
        List<OrderDetail> byOrderId = orderDetailMapper.getByOrderId(orders.getId());
        //将订单详情封装到vo并返回
        OrderVO orderVO=new OrderVO();
        BeanUtils.copyProperties(orders,orderVO);
        orderVO.setOrderDetailList(byOrderId);
        return orderVO;
    }

    /**
     * 用户取消订单
     * @param id
     */
    @Override
    public void usernodd(Long id) {
        //根据id查询订单
        Orders orders = orderMapper.getbyid(id);

        // 校验订单是否存在
        if (orders==null){
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        if (orders.getStatus()>2){
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);

        }
        Orders orders1 = new Orders();
        orders1.setId(orders.getId());

        // 订单处于待接单状态下取消，需要进行退款
        if (orders.getStatus().equals(Orders.TO_BE_CONFIRMED)){

            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        // 更新订单状态、取消原因、取消时间
        orders1.setStatus(Orders.CANCELLED);
        orders1.setCancelReason("用户取消");
        orders1.setCancelTime(LocalDateTime.now());
        orderMapper.insert(orders1);
    }


}









